CAT 5G-0811 BUSHING

CAT 5G-0811 is a commonly used steel-backed bimetallic sleeve bushing for Caterpillar construction machinery. It is suitable for low- to medium-load swing joints such as the boom, stick, and connecting rod of mini excavators and loaders. The following is precise technical and application information:

Core Technical Parameters
Item Details
Part Model: CAT 5G-0811 (5G0811) Straight Bimetallic Sleeve Bushing, Suitable for 25 mm diameter pins, Weight: Approx. 0.28 kg (0.62 lb)

Core Material: Steel backing (SAE 1045 steel, 2 mm thickness) + inner liner (CuSn6Zn6Pb3 tin bronze, containing solid graphite, 1.5 mm thickness), copper layer hardness HB 80-100, coefficient of friction ≤0.15 (lubricated state)

Key Dimensions: Inner diameter 25 mm (tolerance H7), outer diameter 30 mm (tolerance g6), total length 35 mm, inner hole 2 Axial lubrication groove, two radial oil holes (180° evenly distributed, φ3 mm), end face chamfer 1×45°

Rated Parameters: Operating temperature -20℃ to +120℃, rated radial load 55 kN, suitable oscillation frequency ≤5 times/minute, pin hardness HRC 45-50, installation interference 0.02-0.04 mm

Suitable Working Conditions: Medium to low load, medium to low oscillation frequency articulation, compatible with NLGI 2 lithium-based grease, anti-mud and anti-vibration, suitable for dusty working conditions

Compatible Models: CAT 303CR/304CR mini excavator (stick-linkage), 903C loader (rocker arm-boom), 216B3 skid steer loader (bucket-linkage)

Accessories: Compatible pin 175-4038, bolt 106-7772 (M12×20), grease nipple 1U-8878, Dust Ring 453-2163 Core Functions and Structural Features

Bimetallic Wear Resistance: Strong steel backing, tin bronze liner + graphite self-lubricating, suitable for short-term oil-free conditions, preventing metal-to-metal seizing.

High-Efficiency Lubrication: Axial lubrication grooves + radial oil holes ensure even grease coverage of the inner hole, reducing oscillation wear.

Impact Resistance: Bimetallic structure absorbs hinge impact, protecting the pin and mounting hole, suitable for vibration conditions in engineering machinery.

Easy Installation: Straight cylindrical cold-press installation, suitable for confined spaces, no additional positioning parts required, can directly replace old parts.

Installation and Maintenance Points
Installation Specifications
Clean the bushing, mounting hole, and pin, remove burrs and oil stains, check for cracks and copper layer peeling.

Cold-press installation, pressing force ≤25 kN, bushing end face flush with mounting hole, after installation, inner hole roundness ≤0.03 mm, coaxiality ≤0.05 mm.

Fill with lithium-based grease; during trial operation, there should be no jamming or abnormal noise, and the oscillation clearance should be ≤0.2 mm.

Maintenance Recommendations: Replenish grease every 300 hours; check for wear every 1000 hours. Replace when inner hole wear >0.25 mm or copper layer peeling occurs.

Avoid prolonged dry friction to prevent rapid wear of the copper layer.